Welcome to the forum 
First Did you drive faster than 1 km/h otherwise you can´t turn on autosteer. (Except from when in DRIVE in the autosteer setup)
Do you have a PCBv2? and just want to check why it doesn´t work with this schematic?
The Schematic you found is some years old.
Have you seen the new Support folder on the github? find it in top of this thread: Release v4.3.10 - Finally!
Without PCB you could figure out the new pin numbers used with program v4.3.10 by looking in AutosteerSchematic.pdf
BUT in v4.3.10 you also need a ADS1115 to connect WAS to I2C as the A0 no longer work.
For testing in SIM you can leave out a WAS.
Check the setup videos from Brian by clicking the youtube button at top of the forum screen.